Some people's parents raise them to post stupid things.
The problem is that there's an implied argument here. That people used to be a lot more racist and that people's opinions are in part determined by their upbringing isn't interesting or new information, and you know that it's not. So you're not bringing this up as an interesting factoid. You're bringing this up because you think people need to be more mindful of this. Who's behaving as if they're insufficiently mindful of the various reasons why people turn out racist?
All I see is strongly-worded criticism. So I feel like the only plausible goal of your post was to convince people that criticism in this thread is too harsh given that Bundy is just a product of his upbringing, or whatever. That's why you appear to be justifying or at least excusing racism. If that's not what you were aiming to do, you probably should explain why you felt the need to say what you said.